With everything everyone's already said, while a really high ATK is nice, but for many players, building a team around a arhtype is arguably more important than raw stat power.

Given her abilities, it's already been stated she does not fit into any one particular typing; with exception of speed negation, all her other abilities can be useful in some situation, especially that 1.36x skill act. She also have DEF boost, but no counter, which makes her like a half-finished project...So she can fit in any team, boosting its existing skillsets, but she won't be a "make-it-or-break" team member because of her lack of specialization.

On a side note, many loli-fans seem to like her design. So while she is general enough to fit in many teams, she has a lack of specialized skillset to distinguish herself amongst today's power-creep, she might be fading if she does not get buffed. Her 1.36x skill act. is nothing to scoff at, but it's about the only feature I can give points on. So C TIER is my vote.